<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="app">
 <h2 class="d1" :class="[active,line]">{{message}}</h2>
</div>
  <script src="../js/vue.js"></script>
<script>
  const app = new Vue({
    el:'#app',
    data:{
      message:"message",
      active:'aaaa',
      line:'bbbbbb'
    //active 是从服务器请求来的


    },
    methods:{

    }

  })
</script>

</body>
</html>